Twist Bioscience holder plans $282K stock sale

Rule 144 filing for Twist Bioscience common stock discloses planned sales by Emily M. Leproust tied to vesting compensation and related tax obligations.

Rhea-AI Filing Summary

Twist Bioscience Corp (TWST) received a Rule 144 notice relating to planned sales of its common stock by Emily M. Leproust through Fidelity Brokerage Services LLC. The notice covers an intended sale of up to 2,302 shares of common stock, with an aggregate market value of $282,280.22 as of September 8, 2026.

The shares to be sold arise from restricted stock vesting on September 4, 2026, reported as a compensation-related distribution by the issuer. The filer also discloses multiple prior sales of Twist common stock during the past three months, and notes that the current sale includes shares to cover a tax obligation from settlement of a vested equity award.

Key Figures

Planned shares to be sold: 2,302 shares Aggregate market value of planned sale: $282,280.22 Shares sold on August 10, 2026: 113,318 shares +5 more

8 metrics

Planned shares to be sold 2,302 shares Intended Rule 144 sale of Twist Bioscience common stock

Aggregate market value of planned sale $282,280.22 Value of 2,302 shares as of September 8, 2026

Shares sold on August 10, 2026 113,318 shares Previously sold Twist Bioscience common stock in one transaction

Dollar value of August 10, 2026 sale $14,183,062.19 Proceeds from that single prior sale of common stock

Shares sold on June 25, 2026 18,880 shares Previously reported sale of Twist Bioscience common stock

Dollar value of June 25, 2026 sale $1,793,600.00 Proceeds from that June 25, 2026 transaction

Shares sold on August 25, 2026 41,570 shares Previously reported sale of Twist Bioscience common stock

Dollar value of August 25, 2026 sale $6,317,760.97 Proceeds from that August 25, 2026 transaction

Key Terms

Rule 144, Restricted Stock Vesting, vested equity award, compensation, +1 more

5 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 09/04/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

vested equity award financial

"tax obligation resulting from the settlement of a vested equity award distribution."

compensation financial

"09/04/2026 | Compensation"

attorney-in-fact regulatory

"as attorney-in-fact for Emily M. Leproust"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

What does the Rule 144 filing for TWST disclose about upcoming stock sales?

The Rule 144 notice reports an intended sale of up to 2,302 shares of Twist Bioscience common stock by Emily M. Leproust through Fidelity Brokerage Services LLC, with an aggregate market value of $282,280.22 as of September 8, 2026.

Who is selling Twist Bioscience (TWST) shares in this Rule 144 notice?

The notice identifies Emily M. Leproust as the person for whose account Twist Bioscience common stock is to be sold, with Fidelity Brokerage Services LLC acting as the broker and signing through a duly authorized representative as attorney-in-fact.

What is the source of the TWST shares being sold under this Rule 144 filing?

The securities to be sold are Twist Bioscience common shares received from restricted stock vesting on September 4, 2026, categorized as a compensation-related distribution from the issuer.

How much Twist Bioscience (TWST) stock has been sold in the last three months by this filer?

The filing lists several prior sales of Twist Bioscience common stock by Emily M. Leproust over the past three months, including transactions on June 8, June 22, June 25, August 3, August 10, August 12, August 21, and August 25, 2026, each with stated share amounts and dollar values.

Does the Rule 144 sale for TWST include shares to cover taxes?

Yes. The remarks state that the sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution, indicating part of the sale is for tax-related purposes.

On which market is the Twist Bioscience (TWST) stock in this filing traded?

The Rule 144 information identifies the common stock as traded on NASDAQ, with the broker listed as Fidelity Brokerage Services LLC and the relevant date for the reported market value as September 8, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/08/2026 - 03:18 PM Accepted by SEC EDGAR 09/08/2026 - 03:17 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001753655
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Twist Bioscience Corp
SEC File Number	001-38720
Address of Issuer	681 GATEWAY BLVD. SOUTH SAN FRANCISCO CALIFORNIA 94080
Phone	800-719-0671
Name of Person for Whose Account the Securities are To Be Sold	Leproust Emily M.
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	2302	282280.22	62707424	09/08/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/04/2026	Restricted Stock Vesting	Issuer			2302	09/04/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	06/08/2026	2265	158197.11
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	06/22/2026	1688	147400.21
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	06/25/2026	18880	1793600.00
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	08/03/2026	5101	435223.44
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	08/10/2026	113318	14183062.19
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	08/12/2026	19952	2495508.37
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	08/21/2026	6639	923261.83
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	08/25/2026	41570	6317760.97

144: Remarks and Signature

Remarks	Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
Date of Notice	09/08/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Margaret Campbell, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Emily M. Leproust
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)